Metallic sodium is monovalent and crystallizes in a bcc structure with a lattice constant of 4.25 A. Calculate the number density of conduction electrons and the Fermi energy at 0 K.
हम पहले क्रमशः संवाहक इलेक्ट्रॉनों की संख्या घनत्व (Number Density) और फर्मी ऊर्जा (Fermi Energy) की गणना करेंगे। --- ### 1. संवाहक इलेक्ट्रॉनों की संख्या घनत्व (n) की गणना सोडियम (Na) एक मोनोवैलेंट धातु है और इसकी क्रिस्टल संरचना BCC (Body-Centered Cubic) है। इसका लैटिस कॉन्स्टेंट \( a = 4.25 \) Å \( = 4.25 \times _____ _______ ____ _________ ___ ____ _______ ____ _______.
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Calculate the temperature at which the number of electrons in the conduction band of a semiconductor is four times the number at room temperature. Take the band gap energy to be 1.2 eV with Ec - EF ≈ EG.
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